Topband: question about antenna bandwidth

[Mirko S57AD]

I don't know how much bandwidth you could get with coaxial quarterwave
transformer (say, two quarterwave lengths of coax in parallel to transform
12 Ohm of an inverted L to 50 Ohm)?
In previous life I was used to use quarterwave 75 Ohm cable to broaden
bandwith of 80m dipole(s)...

73  Mirko, S57AD

2012/5/7 Rob Stampfli <rob at cboh.org>

> Thanks, gentlemen (Eddy, K8GG, ZR, Roy, Herb, et. al.), for all the
> feedback on this.  So, it seems it's pretty much what I expected --
> if you tune an antenna for better results on one frequency, you
> detract from its operation on another.  Maybe one of these days I'll
> get around to playing around with that 3/8 wavelength L anyway...
>
> Rob / KD8WK
>
> On Mon, May 07, 2012 at 03:22:19PM -0400, Herb Schoenbohm wrote:
> > Another rule for this is "the lower the Q of the matching network the
> > greater the bandwidth."
> >
> > Herb Schoenbohm, KV4FZ
> >
> > On 5/7/2012 1:48 PM, Roy wrote:
> > > If I were to extend my 1/4-wave inverted-L to a 3/8-wave L, and tune
> > > out the inductance with a fixed capacitor at the base, what would this
> > > do to the broadbandedness of the antenna?
> > >
> > > There is an old basic principle to remember about this, "The fewer the
> > > components in general, the broader the bandwidth."
> > >
> > > 73,   Roy   K6XK
>
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